lenco

Please help!!!   I have a 15 .5 hp kohler single cylinder, verticle engine model CV15S  that does not have spark.----- The system seems to have only 2 parts the magnets that bolt onto the flywheel and the coil which goes dirrectly to the spark plug. I replaced the coil and still no spark. Could the magnets be weak?-------- I have a very slight glow from a spark plug tester but no spark. -----One of the problems is that the flywheel magnets are not replaceable execpt by replacing the flywheel.---- I am not sure enough to spend another $150.00 to find out that was not the problem. Thanks for your help.